package org.wtframework.platform.server.model.impl;


import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.ImageIcon;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class ImageScale {

		public static void resize(File originalFile, File resizedFile,
				int newWidth, float quality) throws IOException {

			if (quality > 1) {
				throw new IllegalArgumentException(
						"Quality has to be between 0 and 1");
			}

			ImageIcon ii = new ImageIcon(originalFile.getCanonicalPath());
			Image i = ii.getImage();
			Image resizedImage = null;

			int iWidth = i.getWidth(null);
			int iHeight = i.getHeight(null);

			
			//if (iWidth > iHeight) {
				resizedImage = i.getScaledInstance(newWidth, (newWidth * iHeight)
						/ iWidth, Image.SCALE_SMOOTH);
//			} else {
//				resizedImage = i.getScaledInstance((newWidth * iWidth) / iHeight,
//						newWidth, Image.SCALE_SMOOTH);
//			}
			
			
			// This code ensures that all the pixels in the image are loaded.
			Image temp = new ImageIcon(resizedImage).getImage();
			

			// Create the buffered image.
			BufferedImage bufferedImage = new BufferedImage(temp.getWidth(null),
					temp.getHeight(null), BufferedImage.TYPE_INT_RGB);

			// Copy image to buffered image.
			Graphics g = bufferedImage.createGraphics();

			// Clear background and paint the image.
			g.setColor(Color.white);
			g.fillRect(0, 0, temp.getWidth(null), temp.getHeight(null));
			g.drawImage(temp, 0, 0, null);
			g.dispose();

			// Soften.
			float softenFactor = 0.05f;
			float[] softenArray = { 0, softenFactor, 0, softenFactor,
					1 - (softenFactor * 4), softenFactor, 0, softenFactor, 0 };
			Kernel kernel = new Kernel(3, 3, softenArray);
			ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
			bufferedImage = cOp.filter(bufferedImage, null);

			// Write the jpeg to a file.
			FileOutputStream out = new FileOutputStream(resizedFile);

			// Encodes image as a JPEG data stream
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

			JPEGEncodeParam param = encoder
					.getDefaultJPEGEncodeParam(bufferedImage);

			param.setQuality(quality, true);

			encoder.setJPEGEncodeParam(param);
			encoder.encode(bufferedImage);
		} // Example usage

	
}